io.github.CryptoAPIs-io/mcp-x402-pay
mcp-x402-pay
MCP server that pays x402-gated HTTP endpoints — fetch, and on a 402 authorize, sign, retry
alive probed 2026-10-15
3tools
4.2ktokens in Claude Opus 5.5
4.3ktokens in Claude Code
2.1 %of a 200k context window
2.5ko200k_base estimate
2.0 sto initialize
9 msto list tools
- Run it
- npx -y @cryptoapis-io/mcp-x402-pay@0.5.3 (stdio, probed in a container with the network off)
- Host
- npmjs.com
- Reports itself as
- mcp-x402-pay 0.1.0
- Capabilities
- tools
- Instructions
- none
- Claude count
- Claude Opus 5.5, measured 2026-10-15. Counted again when the tool definitions change. Method.
- Repository
- https://github.com/CryptoAPIs-io/cryptoapis-mcp-x402-pay
- Registry
- active, updated 2026-09-24 · registry entry
- Reachable
- 1 of the last 1 probe
Most expensive tools
| Tool | Tokens (o200k) | Share of this server |
|---|---|---|
| x402_pay | 1 163 | 47 % |
| x402_pay_tool | 920 | 37 % |
| x402_discover | 414 | 17 % |
Badge and feed
[](https://mcpcost.ulehla.dev/s/io.github.CryptoAPIs-io/mcp-x402-pay)
An entry for every probe that changed the result, the tool count or the token cost: Atom feed. Add it to a feed reader or a Slack RSS app to hear when the server stops answering or its tool set grows.